Extend withUndoRedo with custom keys

[marcindz88]

Hi, I would like to use withUndoRedo feature, but also with other store keys that are not necessarily entities or collections. As far as I checked, we could add options keys or custom keys to feature config and append these keys to those created by the collection mapper or possibly include only specified keys.

Also I am worried by the deep comparison JSON stringify performance in large stores, but I have not yet checked if it's going to cause an issue for me.

Have you considered implementing undo-redo by only keeping action diff and not whole store for given keys?

[marcindz88]

It would also be possible to infer the available keys as follows:

export function withUndoRedo<Input extends SignalStoreFeatureResult>(options: {
  maxStackSize?: number;
  keys?: (keyof Input['state'])[];
}): SignalStoreFeature<
  EmptyFeatureResult & Input,
  EmptyFeatureResult & {
    computed: {
      canUndo: Signal<boolean>;
      canRedo: Signal<boolean>;
    };
    methods: {
      undo: () => void;
      redo: () => void;
    };
  }
>

[rainerhahnekamp]

Also from here: Thanks and good work @marcindz88